Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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The golden oolitic limestone (lower part of the Jumara Formation) was earlier considered to be the oldest rock unit in the Middle Jurassic stratigraphic succession of Keera dome, Kachchh district. Gujarat. The author has, however, recorded a 12 meter thick succession comprising shale with marl, siltstone, shale with ironstone, and ferruginous calcareoue sandstone underlying the golden oolitic limestone. These rock units contain ammonite fossils similar to those in the golden oolitic limestone, viz., Macrocephalites madagascariensis and M. formosus (Sowerby) ♀ morph formosus. The unit has been assigned Lower Callovian age on the basis of aforesaid fauna.
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